"Materialism acknowledges to the indestructability of matter and the uncreatability of matter (but one can transform one form of matter into another, like energy into mass and vice versa), which is in accordance with science, and therefore the universe did not begin."

What's more, if I understand him correctly, Stengner shows, in "God: The Failed Hypothesis" that the amount of energy in the Universe (when you take into account negative energy - this does exist - it's not just airy fairy bad vibes) is exactly zero.

This leaves the materialist/naturalist with even less to explain, it takes away the intuitively understood something from nothing question to begin with. Energy is simply a random disturbance in what would otherwise be known as nothing.